# 读取文件 with的作用 不用给自己打开或关闭文件 系统会在合适的时候自己关闭文件 避免了提前关闭读取不到数据 或忘记关闭的情况
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_object:
mess=file_object.read()
print(mess)
# 逐行读取
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_lines:
for line in file_lines:
print(line)
# 单独每行打印的时候 会有空白行 因为文件每行后面有个换行符
#abcdefgdfghjkl
#dddddddddewfwergrg
#gergbhtbtrbnrwbn
#rbtwrtbhwtbrwnbwbwr
# 解决空白行方法
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_liness:
for line in file_liness:
print(line.rstrip())
#abcdefgdfghjkl 结果
#dddddddddewfwergrg
#gergbhtbtrbnrwbn
#rbtwrtbhwtbrwnbwbwr
#创建一个包含文件内容的列表
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_lbs:
lbs=file_lbs.readlines()
print(lbs) #['abcdefgdfghjkl\n', 'dddddddddewfwergrg\n', 'gergbhtbtrbnrwbn\n', 'rbtwrtbhwtbrwnbwbwr\n']
写入文件
#创建一个包含文件内容的列表
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_lbs:
lbs=file_lbs.readlines()
print(lbs) #['abcdefgdfghjkl\n', 'dddddddddewfwergrg\n', 'gergbhtbtrbnrwbn\n', 'rbtwrtbhwtbrwnbwbwr\n']
# 写入文件 r 读 w写 a 添加
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt','w') as file_x:
file_x.write("abcde")
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_object:
mess=file_object.read()
print(mess) #abcde 此时文件中的内容就只有 abcde
# 添加
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt','a') as file_add:
file_add.write("asdf.\n") # 不换行?????
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_object:
mess=file_object.read()
print(mess) #abcdeasdfg